ADP3166 - 4-Phase Synchronous Buck Controller

FUNCTIONAL BLOCK DIAGRAM VCC 28 RAMPADJ RT 14 13 ADP3166 EN 11 UVLO SHUTDOWN AND BIAS OSCILLATOR + GND 19 CROWBAR 6 CSREF 2.1V DAC + 300mV CSREF + DAC 300mV 23 SW1 PWRGD 10 DELAY 22 SW2 21 SW3 ILIMIT 15 EN CURRENT LIMIT CIRCUIT + 20 SW4 17 CSSUM 16 CSREF 18 CSCOMP SOFT

• S Selectable 2-, 3- or 4-Phase Operation at up to 1 MHz per Phase Differential Sensing Error ± 1% over Temperature Logic-Level PWM Outputs for Interface to External High Power Drivers Active Current Balancing between All Output Phases Built-in Power Good Blanking Supports On-the-Fly VID Code Changes 5-Bit Digitally Programmable 0.8 V to 1.55 V Output Short-Circuit Protection with Programmable Latch-Off Delay Overvoltage Protection Crowbar Logic Output.